At 95 gallons the B448 is the largest thing most hulls can honestly swallow, and filling it is a trim event: about 792 lb of water when topped off. That much mass moving from full to empty over a passage changes waterline and handling, which is why big-tank boats often run baffled plumbing schedules and why placement on the centerline matters more here than on any smaller molding.
It is still a dual-role Ronco shell. Specify fresh and you get FDA-compliant potable polyethylene sized for serious cruising autonomy; specify waste and the same molding becomes a high-capacity gray/black holding tank for boats that host crowds. The blank ships at 131 lb.
Fittings are never an afterthought at this size - Ronco installs them per order, spin-welded or threaded to your marks, at the Tustin, California plant running since 1974. Print the drawing below, plan fill, vent, pickup, and inspection access, and commit the layout in the on-page fitting planner.
Get the lane priced early with the freight cost estimator - this ships LTL. The rest of the marine range is under boat tanks and the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
